countdown
音標['kauntdaun] 讀音漢語翻譯
n. 倒計數
【電】 指示串聯中的運算元固定的記錄減少
英文解釋：
名詞 countdown:
- counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle)
詳細解釋：
count.down
n.（名詞）The counting backward aloud from an arbitrary starting number to indicate the time remaining before an event or operation, such as the launching of a missile or space vehicle.倒數報時：從任意的一個數字開始倒著數，以表明距離某件事或操作（例如發射飛彈或宇宙飛船）的時間The checks and preparations carried out during this activity.準備過程，準備工作：在倒數報時期間所進行的檢查和準備
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